Portable fire extinguisher



July 8 1924.

1.500346 F. E. KRAUSS PORTABLE FIRE EXTINGUISHER Filed May 4. 1923 [72were for:

envelops in order to protect it.

Patented July 8, 1924.

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FRIEDRICH EMIL KRAUSS, OF SCHVJARZENBERG, GERMANY.

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Application filed Ma a, 1923; Serial No. 636,746.

T 0 all whom it may concern,

Be it known that FRIEDRICH EMIL KRAUss, a citizen of the GermanRepublic, a manufacturer, residing at Schwarzenberg, in Saxony, Germany,has invented certain new and useful Improvements in Portable FireExtinguishers, of which the following is a specification.

This invention relates to portable fire extinguishers of the typeinwhich a stream of liquid is'expelled by a stored or generated gas underpressure.

According to my invention the action of fire extinguishers employingliquids is rendered entirely independent from the position in which theyare held. My invention consists essentially in inserting a pistonbetween the gas under pressure and the extinguishing liquid. The gastherefore does not act directly on the liquid, but forces the liquid outof the extinguisher through the agency of the piston. This piston keepsthe liquid covering the mouth of the riser at all times, thus preventingthe gas from flowing therethrough even when the extinguisher is reversedor held in an inclined position.

The drawing illustrates one embodiment of my invention in longitudinalsection.

Referring to the drawing a is the receptacle for the liquid with theriser or ascending pipe Z) opening into it near the bottom andterminating at the upper end into a nozzle 0. This receptacle a issurrounded by a container d for the pressure gas. In the exampleillustrated the gas container d is utilized as a protective jacket forthe liquid receptacle a, which it completely The top of the receptacle ais fitted with a disk 6 adapted to be perforated and above it a strikin-pin f is guided in a stufiing box 9 of the 1acket d. In the illustratedexample the jacket d is charged with gas of a definite pressure.

In the cylindrical receptacle 0- for the liquid a piston h rests uponthe level of the liquid and is, in the inoperative state of theextinguisher maintained in its raised position by a spring Z. When theex tinguisher is brought into use and the disk 6 is perforated by thestriking-pin f, the pressure in the jacket (Z acts upon the piston h andthrough it upon the column of liquid in the receptacle a, which isforced into the J riser or ascending pipe I) and forced out through thenozzle 0, no matter in which position the extinguisher is held. The gasunder pressure can therefore not reach the mouth of the riser Z), but isobliged to propel. the liquid through the medium of the piston h.

In order to make sure that the extinguisher acts even if for some reasonthe piston it should bind in the receptacle a and refuse to advanceunder the pressure of the gas, the piston h is provided with a passagefor the gas, which is closed by a check valve 2' as long as conditionsare normal. The

spring 6 should be chosen of such tension that it only gives way after acertain excess pressure has been reached. The gas under the excesspressure then forces the ball-valve off its seat and passes through theopenings 71': in the piston it directly on to the column of liquid inthe receptacle a.

It will be readily understood, that I do not limit myself to any detailsof construction of the improved fire extinguisher and that the typeillustrated is only shown by way of example.

hat I claim as my invention and desire to secure by Letters Patent is 1.In a fire extinguisher operating with a liquid under gas pressure, thecombination of a receptacle containing the liquid, a pressure gascontainer in communication with said receptacle, a piston between theliquid and the inlet for the'gas under pressure and a pressure actuatedvalve in said piston.

2. In a a liquid under gas pressure, the combination of a receptaclecontaining the liquid, a pressure gas container in communication withsaid receptacle, a striking-pin and disk adapted to control theadmission of the gas to the liquid, a piston between the liquid and theadmission port, for the gas under pressure and a spring adapted tomaintain said piston in its raised position and a pressure releasedvalve in said piston.

.3. In a fire extinguisher operating with a liquid under gas pressure,the combination of a receptacle containing the liquid, a pressure gascontainer in communication with said receptacle, a piston between theliquid fire extinguisher operating with and the admission port for thegas under pressure, means for controlling the admission port, a sprlngfor maintaining said i ton 1n its rais d osition and a check valveclosing a passage through said piston and adapted to be opened by excesspressure caused by the binding of the piston.

4. In a fire extinguisher operating with a liquid under gas pressure,the combination of a receptacle containing the liquid, a jacketcompletely enclosing said receptacle and serving as a gas container, aport for admitting the gas in the top of the recep- W tacle, means forcontrolling said port, a

piston between the liquid and said admission port, a spring formaintaining said piston in the raised position and a check valve closinga passage through said piston and adapted to be opened by the excesspressure set up when the said piston refuses to move.

In testimony whereof I aflix my signature.

FRIEDRICH EMIL KRAUSS.

